Cosmetic composition with multiple emulsion formulation having lamellar liquid crystal structure

Abstract

The present invention relates to a cosmetic composition of a multiple emulsion formulation having a lamellar liquid crystal structure, and a method for preparing the same. More particularly, the cosmetic composition is prepared using different single emulsification type emulsions, i.e. a W/O type emulsion and an O/W type emulsion which has a lamellar liquid crystal structure, or using a mixture having constituent ingredients thereof. Thus, the present invention has effects of stably maintaining effective ingredients of the cosmetic composition, and enhancing the feeling of use.

1 . A method for preparing a cosmetic composition of a multiple emulsion formulation, comprising:
 (a) preparing a W/O-type emulsion;   (b) adding an emulsifying agent and adjuvant and an oily base solution to an aqueous base solution;   (c) adding the W/O-type emulsion to a mixed composition including the aqueous base solution, the emulsifying agent and adjuvant, and the oily base solution; and   (d) emulsifying the mixed composition prepared in the (c) step,   wherein
 the emulsifying agent and adjuvant are a liquid crystal-forming emulsifying agent and adjuvant; 
 the liquid crystal-forming emulsifying agent and adjuvant comprise compound represented by the following Formula 2; 
 in step (a), the W/O-type emulsion is maintained in a range of 50 to 65° C.; 
 in step (b), the mixture of the emulsifying agent and adjuvant and the oily base solution and the aqueous base solution is maintained in a simple mixture state without forming an O/W-type emulsion having a lamellar liquid crystal structure; and in the (c) step, the W/O-type emulsion maintained in a range of 50 to 65° C. is added to the mixed composition including the aqueous base solution, the emulsifying agent and adjuvant and the oily base solution with stirring in a range of 1,000 to 3,000 rpm so that a content of the W/O-type emulsion is in a range of 5 to 15% by weight, based on the total weight of the mixed composition; and 
 in step (d), emulsification is carried out by a homomixer set in a range of 3,000 to 6,500 rpm, 
   
       
         
           
           
               
               
           
         
         
           wherein X 1  is a dehydrogenated C11 to C21 aliphatic alcohol. 
         
       
     
     
         2 . The method of  claim 1 , wherein the W/O-type emulsion is replaced with an O/W-type emulsion, and the aqueous base solution, and the emulsifying agent and adjuvant and the oily base solution are mutually replaced. 
     
     
         3 . The method of  claim 1 , further comprising:
 adding a thickening agent after the adding of the W/O-type emulsion.   
     
     
         4 . The method of  claim 1 , further comprising:
 determining whether a lamellar liquid crystal structure is formed in the composition after the final step defined in the claims.   
     
     
         5 . The method of  claim 1 , wherein the compound represented by Formula 2 is selected from the group consisting of arachidyl glucoside, cetearyl glucoside, and a mixture thereof.